866693565396668 has 12 divisors (see below), whose sum is σ = 1531730707162152. Its totient is φ = 429056220493200.

The previous prime is 866693565396661. The next prime is 866693565396713.

866693565396668 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866693565396661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072640550830 + ... + 1072640551637.

It is an arithmetic number, because the mean of its divisors is an integer number (127644225596846).

Almost surely, 2^{866693565396668} is an apocalyptic number.

It is an amenable number.

866693565396668 is a deficient number, since it is larger than the sum of its proper divisors (665037141765484).

866693565396668 is a wasteful number, since it uses less digits than its factorization.

866693565396668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145281102572 (or 2145281102570 counting only the distinct ones).

The product of its digits is 326517350400, while the sum is 92.

The spelling of 866693565396668 in words is "eight hundred sixty-six trillion, six hundred ninety-three billion, five hundred sixty-five million, three hundred ninety-six thousand, six hundred sixty-eight".